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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Duct through penis that carries sperm and urine






2. Can survive ~7 days in cow. vast majority <48 hours






3. Failure to have both testis (gonads) descend






4. 2 month growth cycle. stored in the epididymis of the bull






5. Organ of copulation - provides passageway for semen and urine - muscular organ characterized especially by its spongy - erectile tissue that fills with blood






6. 16-20 hours






7. (male) pushes the testes upward toward the body for warmth or protection






8. Not being bred back into herd. horses are seasonal breeders vs. cows as anytime breeders






9. The more stressed out the male is - the less sperm he is going to produce






10. (FSH) causes egg to mature in females






11. Boars and stallions-> deliver semen directly into the cervix. bulls and rams-> deliver semen into the vagina.






12. Larger the cow - more milk is produced; smaller the cow - less milk is produced






13. Depository for semen during insemination. where urine leaves the body






14. Animals which have only one estrous cycle (ex: dog - fox)






15. 1. bring in new genes - 2. replace males with leg problems (difficulty breeding) Note: culling has a much greater emphasis in the dairy industry vs the beef industry.






16. Sperm is produced here






17. ~305 days (altough often longer due to breeding difficulties)






18. Cycle that lasts weeks (ovulation->hormone cycles->ovulation)






19. Animal which has been castrated after puberty






20. 265-285 days






21. S-shaped inside body - relaxes to be exposed for breeding. Disadvantges: muscles weaken with age - cannot always hold it in - exposed to harsh outside conditions or stepped on.

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22. Check feet and legs - look for masculine traits in build such as crest and muscling






23. Urinary calculi.






24. Milk is 15% ________ and 85% __________.






25. When she is pregnant in her last trimester because she needs the energy to carry around and deliver the calf. and when the calf is born because the cow needs the fat to be deposit it into her milk for the calf's energy stores.






26. Duct which connects epididymis to urethra of the penis. transports sperm at ejaculation. cut to sterilize male.






27. 19-23 (21) days






28. Contains and regulates the temp of the testes for sperm production






29. % of fat in milk. makes cheeses and ice cream. regulates cost of milk






30. (male) pushes the testes outward toward the legs for a cool-down off of the body






31. Scar tissue plugs up chambers of udder






32. BST given to dairy cattle makes the mammary gland more persistent - helps produce more milk. good as Long-term because it does not cause cow to bulk up - provides more milk/cow Which means less cows needed - less cows need to be given feed - lower co






33. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has






34. Superior genes are _______ to multiply






35. 114 days






36. To remove/separate testicles from animal's body before animal reaches puberty






37. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has






38. Constitute 50-90% of the volume of the ejaculate. (3 glands total: seminal vesicles - prostate gland - cowper's gland)






39. 147 days






40. BST given to dairy cattle makes the mammary gland more persistent - helps produce more milk. good as Long-term because it does not cause cow to bulk up - provides more milk/cow Which means less cows needed - less cows need to be given feed - lower co






41. Prevent the cow from getting an infection from the calve






42. Milk ~305 days - dry 60 days prior to calving






43. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat






44. 1-3 days






45. Reproduction. more offspring leads to more feed costs - but is offset by reproduction numbers






46. Milk is 15% ________ and 85% __________.






47. (male) pushes the testes upward toward the body for warmth or protection






48. 19-23 (21) days






49. (FSH) helps to regulate puberty - needed every day - stimulates the sertoli cells to produce nutrients for the sperm






50. Contains and regulates the temp of the testes for sperm production